PMID: 9451409Feb 6, 1998Paper

Assessing glycaemic control in diabetes: relationships between fructosamine and HbA1C

The New Zealand Medical Journal
G D BraatvedtT Cundy

Abstract

Glycated haemoglobin (HbA1C) has become the internationally established method of assessing long term glycaemic control in people with diabetes. In New Zealand the measurement of glycated albumin (fructosamine), which is substantially cheaper than HbA1C has been widely adopted. In this study we have sought to determine if the value of HbA1C can be reliably estimated from knowledge of plasma fructosamine. Fifty subjects with diabetes and stable glycaemic control as assessed by 3-5 simultaneous measurements of HbA1C and fructosamine made sequentially over a median of 6 months, were studied. The relationship between the two measures was assessed by determining 95% prediction intervals for HbA1C from the regression equation relating mean HbA1C and fructosamine. A further 8 subjects with significantly changing glycaemic control were also studied. Mean stable plasma fructosamine and HbA1C measurements were closely correlated (r = 0.661, p < 0.0001) with HbA1C increasing on average 1% for every 56 mumol L-1 increase in fructosamine. The prediction intervals for HbA1C were however wide. Thus at a plasma fructosamine of 350 mumol L-1 the 95% prediction intervals for HbA1C ranged from 6.6 to 11.2% (3 to 11 standard deviations above the m...Continue Reading

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